JP2573235B2 - Air intake and exhaust system silencer for automobiles, etc. - Google Patents

Air intake and exhaust system silencer for automobiles, etc.

Info

Publication number
JP2573235B2
JP2573235B2 JP62193568A JP19356887A JP2573235B2 JP 2573235 B2 JP2573235 B2 JP 2573235B2 JP 62193568 A JP62193568 A JP 62193568A JP 19356887 A JP19356887 A JP 19356887A JP 2573235 B2 JP2573235 B2 JP 2573235B2
Authority
JP
Japan
Prior art keywords
sound
sound wave
exhaust system
torque
air intake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP62193568A
Other languages
Japanese (ja)
Other versions
JPS6436911A (en
Inventor
治生 布下
滋昌 長谷川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sankei Kogyo KK
Original Assignee
Sankei Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sankei Kogyo KK filed Critical Sankei Kogyo KK
Priority to JP62193568A priority Critical patent/JP2573235B2/en
Publication of JPS6436911A publication Critical patent/JPS6436911A/en
Application granted granted Critical
Publication of JP2573235B2 publication Critical patent/JP2573235B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/001—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the system having electrically controlled acoustic pulse generating devices, e.g. loudspeakers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • F01N1/065—Silencing apparatus characterised by method of silencing by using interference effect by using an active noise source, e.g. speakers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Exhaust Silencers (AREA)

Description

【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は自動車等の吸排気系による騒音を防止する装
置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing noise caused by an intake / exhaust system of an automobile or the like.

＜従来の技術＞ 自動車の排気系に生じる騒音を防止する方法として
は、排気パイプ末端にマフラを設けるのが一般的であっ
た。この従来のマフラを排して、排気管にマイク、位相
変換器、スピーカー、アンプ等を設置してマイクで感知
した音を位相変換器で逆位相に変換し、それをスピーカ
ーで発音して相殺消音する方法が提案されている（特開
昭62−48911号）。特開昭62−168913号には、相殺音波
の発生による消音に回転数を検出してマフラーへ設けた
スピーカーから逆位相の出力をするようにしている。こ
の例ではスピーカー以外に圧力センサも設けている。<Prior Art> As a method of preventing noise generated in an exhaust system of an automobile, a muffler is generally provided at an end of an exhaust pipe. By removing this conventional muffler, a microphone, phase converter, speaker, amplifier, etc. are installed in the exhaust pipe, the sound detected by the microphone is converted to the opposite phase by the phase converter, and it is generated by the speaker and canceled. A method of silencing has been proposed (JP-A-62-48911). In Japanese Patent Application Laid-Open No. 62-168913, the number of revolutions is detected when noise is canceled due to the generation of a canceling sound wave, and a speaker provided in a muffler outputs an opposite phase. In this example, a pressure sensor is provided in addition to the speaker.

＜発明が解決しようとする問題点＞ このような従来技術のうち、マフラを設けると、内部
構造が複雑なためコスト高で、また、排気抵抗が増した
り、重量が嵩むため出力が低下する。また、後者の排気
管内へマイク等を設けるのは、集音特性、耐熱性、耐食
性等に対して高性能なマイクが必要となる。排気系に生
じる騒音は、エンジンの回転数からくる周波数成分と、
トルクからくる騒音の強さにある。回転数が同じでもト
ルク値が高いと騒音が大きい。そこで、吸排気系消音装
置における消音は回転数以外のトルク値についても配慮
する必要がある。<Problems to be Solved by the Invention> Among such conventional techniques, when a muffler is provided, the cost is increased due to the complicated internal structure, and the output is reduced due to an increase in exhaust resistance and an increase in weight. Further, providing a microphone or the like in the latter exhaust pipe requires a microphone having high performance with respect to sound collection characteristics, heat resistance, corrosion resistance, and the like. The noise generated in the exhaust system is based on the frequency component of the engine speed,
The strength of the noise coming from the torque. If the torque value is high even at the same rotational speed, the noise is loud. Therefore, it is necessary to take into consideration a torque value other than the number of revolutions in the noise reduction in the intake / exhaust system noise reduction device.

＜問題点を解決するための手段＞ このような従来の難点を本発明者は、排気管内へマイ
クの取付けをすることなく、トルク変換器とタコメータ
から情報を得るエンジン状態検出部（１）と、その検出
信号を受けてデータ処理する制御部（２）、及び制御部
出力により相殺音波を発生する音波発生部（３）とから
なる自動車等の吸排気系消音装置にすることにより解消
したのである。<Means for Solving the Problems> The inventor of the present invention has solved the above-mentioned conventional difficulties by providing an engine state detector (1) that obtains information from a torque converter and a tachometer without mounting a microphone in an exhaust pipe. This problem has been solved by providing a sound absorbing and exhaust system silencer for an automobile or the like comprising a control unit (2) that receives the detection signal and performs data processing and a sound wave generating unit (3) that generates a canceling sound wave by the output of the control unit. is there.

より具体的には、エンジン状態検出部（１）はトルク
変換器（４）とタコメータ（５）とからなり、アンプ
（６）及びデジタル変換器（７）を介してトルク及び回
転数信号を制御部（２）へ送り、制御部（２）は各エン
ジン状態に応じて発生する排気音に対して逆位相となっ
た音データを記憶するCPU（８）を備え、その結果が音
波発生部（３）へ送られる。音波発生部（３）はスピー
カー（９）とそのアンプ（10）及び制御部から出力され
たデジタル信号をアナログ信号に変換するアナログ変換
器（11）とからなる。More specifically, the engine state detection unit (1) includes a torque converter (4) and a tachometer (5), and controls a torque and a rotation speed signal via an amplifier (6) and a digital converter (7). The control unit (2) includes a CPU (8) that stores sound data that has an opposite phase to the exhaust sound generated according to each engine state, and the result is a sound wave generation unit ( Sent to 3). The sound wave generator (3) includes a speaker (9), an amplifier (10) thereof, and an analog converter (11) for converting a digital signal output from the controller into an analog signal.

＜作用＞ 以上のような構造の自動車等の吸排気系消音装置は、
マイクにより直接排気ガス音を採るのではなく、トルク
変換器とタコメータの両方からエンジン状態の情報を間
接的に得るのでより効果的な消音が可能となる上に、排
気管内へのマイクの取付けがなくなり、このことにより
耐熱性、耐食性等を考慮した高性能なマイクを必要とし
なくなった。<Operation> The air intake and exhaust system silencer for an automobile or the like having the above structure is
Rather than taking the exhaust gas noise directly with the microphone, information about the engine state is obtained indirectly from both the torque transducer and the tachometer, so that more effective silencing is possible.In addition, the microphone can be installed in the exhaust pipe. This eliminates the need for a high-performance microphone considering heat resistance, corrosion resistance, and the like.

つまり、エンジン状態検出部（１）がトルク及び回転
数信号を制御部（２）へ送り、制御部（２）はCPU
（８）に記憶する各エンジン状態に応じた音データを逆
位相にして、その結果を音波発生部（３）へ送り排気音
の相殺音波を発生させる。このことにより排気音が消音
される作用が得られる。That is, the engine state detection unit (1) sends the torque and rotation speed signals to the control unit (2), and the control unit (2)
The sound data corresponding to each engine state stored in (8) is reversed in phase, and the result is sent to the sound wave generator (3) to generate a canceling sound wave of the exhaust sound. As a result, an effect of suppressing the exhaust noise can be obtained.

＜実施例＞ 以下図面によって本発明の実施例を詳細に説明する。<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

第１図は本発明の自動車等の吸排気系消音装置の概略
図であり、第２図はブロックダイアグラムである。第３
図は消音装置を設けていない場合に排気管の排出口から
出る音の波形及び音圧レベルを示すグラフである。第４
図は第３図に示した音が発せられる場合に本発明の音波
発生部から発せられる相殺音波の波形及び音圧レベルを
示すグラフである。第５図は排気管の排出口から出る音
の波形及び音圧レベルを示すグラフである。FIG. 1 is a schematic view of a muffler for an air intake / exhaust system of an automobile or the like according to the present invention, and FIG. 2 is a block diagram. Third
The figure is a graph showing the waveform and sound pressure level of the sound coming out of the outlet of the exhaust pipe when no muffler is provided. 4th
FIG. 7 is a graph showing the waveform and sound pressure level of the canceling sound wave emitted from the sound wave generator of the present invention when the sound shown in FIG. 3 is emitted. FIG. 5 is a graph showing a waveform and a sound pressure level of a sound emitted from an outlet of an exhaust pipe.

第１図及び第２図にみられるように、本発明の吸排気
系消音装置はエンジン後方のトランスミッション部（1
2）へエンジン状態検出部（１）が設けられている。エ
ンジン状態検出部（１）は公知のトルク変換器（４）と
デジタルタコメータ（５）とからなり、トルクはアンプ
（６）及びデジタル変換器（７）を介して制御部（２）
へ送られ、回転数信号はそのまま制御部へ送られる。As shown in FIGS. 1 and 2, the intake and exhaust system silencer of the present invention includes a transmission section (1
An engine state detector (1) is provided in 2). The engine state detection unit (1) includes a known torque converter (4) and a digital tachometer (5), and the torque is controlled via an amplifier (6) and a digital converter (7).
The rotation speed signal is sent to the control unit as it is.

制御部（２）は各エンジン状態に応じて発生する排気
音、例えば第３図に示すような音圧レベルと波形の排気
音に対して逆位相となった音データ、すなわち、第４図
に示した音圧レベルと波形の音データを記憶するマイク
ロコンピュータ使用のCPU（８）からなる。制御部へ入
力されたトルク及び回転数信号はここで判断されて逆位
相の音データが用意され、デジタル信号として音波発生
部（３）へと出力される。The control unit (2) generates exhaust sound generated in accordance with each engine state, for example, sound data having an opposite phase to the sound pressure level and the waveform of the exhaust sound as shown in FIG. 3, that is, as shown in FIG. It comprises a CPU (8) using a microcomputer for storing sound data of the indicated sound pressure level and waveform. The torque and rotation speed signals input to the control unit are determined here, and sound data having the opposite phase is prepared, and is output to the sound wave generator (3) as a digital signal.

音波発生部（３）はスピーカー（９）とそのアンプ
（10）及び制御部から出力されたデジタル信号をアナロ
グ信号に変換するアナログ変換器（11）とからなってお
り、スピーカー（９）から第３図と逆位相の音波、すな
わち、第４図に示した音波を発して相殺した後の音波
は、第５図上図のように極端に音圧レベルが低下し、波
形は第５図下図のように波形とは云えないほどに振幅が
小さくなった。The sound wave generator (3) comprises a speaker (9), an amplifier (10) thereof, and an analog converter (11) for converting a digital signal output from the controller into an analog signal. The sound wave having the phase opposite to that of FIG. 3, that is, the sound wave after emitting and canceling the sound wave shown in FIG. 4 has a very low sound pressure level as shown in the upper diagram of FIG. 5, and the waveform is the lower diagram of FIG. The amplitude was so small that it could not be called a waveform.

すなわち、約100dBであった音量が約30dBへと大幅に
減少され、十分実用になり得るものであることが判明し
たのである。That is, the sound volume was reduced from about 100 dB to about 30 dB, which proved to be sufficiently practical.

＜発明の効果＞ 以上詳細に説明したように、本発明の自動車等の吸排
気系消音装置は、従来のようなマフラを不要とし、排気
抵抗を減少すると共に重量を軽減して動力系が発するパ
ワーをフルに活用することができるという有益な効果を
奏するものである。また、高性能マイクも必要とせず、
市販のトルク変換器やタコメータの使用が可能で、製作
容易でコストの削減を可能にしたものである。<Effects of the Invention> As described in detail above, the muffler for air intake and exhaust systems of automobiles and the like according to the present invention eliminates the need for a conventional muffler, reduces exhaust resistance, reduces weight, and generates a power system. This has the beneficial effect of making full use of power. Also, there is no need for a high-performance microphone,
Commercially available torque transducers and tachometers can be used, making it easy to manufacture and reducing costs.

【図面の簡単な説明】[Brief description of the drawings]

第１図は本発明の自動車等の吸排気系消音装置の概略図
であり、第２図はブロックダイアグラムである。第３図
は消音装置を設けていない場合に排気管の排出口から出
る音の波形及び音圧レベルを示すグラフである。第４図
は第３図に示した音が発せられる場合に本発明の音波発
生部から発せられる相殺音波の波形及び音圧レベルを示
すグラフである。第５図は排気管の排出口から出る音の
波形及び音圧レベルを示すグラフである。 （１）エンジン状態検出部、（２）制御部 （３）音波発生部、（４）トルク変換器 （５）タコメータ、（６）アンプ （７）デジタル変換器、（８）CPU （９）スピーカー、（10）アンプ （11）アナログ変換器FIG. 1 is a schematic view of a muffler for an air intake / exhaust system of an automobile or the like according to the present invention, and FIG. 2 is a block diagram. FIG. 3 is a graph showing a waveform and a sound pressure level of a sound emitted from an outlet of an exhaust pipe when a muffler is not provided. FIG. 4 is a graph showing the waveform and sound pressure level of the canceling sound wave emitted from the sound wave generator of the present invention when the sound shown in FIG. 3 is emitted. FIG. 5 is a graph showing a waveform and a sound pressure level of a sound emitted from an outlet of an exhaust pipe. (1) Engine state detection unit, (2) control unit (3) sound wave generation unit, (4) torque converter (5) tachometer, (6) amplifier (7) digital converter, (8) CPU (9) speaker , (10) Amplifier (11) Analog converter

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】トルク変換器とタコメータから情報を得る
エンジン状態検出部（１）と、その検出信号を受けてデ
ータ処理する制御部（２）、及び制御部出力により相殺
音波を発生する音波発生部（３）とからなる自動車等の
吸排気系消音装置。An engine state detecting section for obtaining information from a torque transducer and a tachometer, a control section for performing data processing in response to the detection signal, and a sound wave generation for generating a canceling sound wave by an output of the control section. A silencer for an air intake / exhaust system for an automobile or the like, comprising a part (3). 【請求項２】エンジン状態検出部（１）はトルク変換器
（４）とタコメータ（５）とからなり、アンプ（６）及
びデジタル変換器（７）を介してトルク及び回転数信号
を制御部（２）へ送り、制御部（２）は各エンジン状態
に応じて発生する排気音に対して逆位相となった音デー
タを記憶するCPU（８）とその結果を音波発生部（３）
へ送る出力部とからなり、音波発生部（３）はスピーカ
ー（９）とそのアンプ（10）及び制御部から出力された
デジタル信号をアナログ信号に変換するアナログ変換器
（11）とからなる特許請求の範囲第１項記載の自動車等
の吸排気系消音装置。2. An engine state detecting section (1) comprises a torque converter (4) and a tachometer (5), and controls a torque and a rotation speed signal via an amplifier (6) and a digital converter (7). (2), the control unit (2) stores a CPU (8) for storing sound data having an opposite phase to the exhaust sound generated according to each engine state, and a sound wave generating unit (3).
The sound wave generator (3) comprises a speaker (9), an amplifier (10) thereof, and an analog converter (11) for converting a digital signal output from the controller into an analog signal. An air intake / exhaust system muffler for an automobile or the like according to claim 1.
JP62193568A 1987-07-31 1987-07-31 Air intake and exhaust system silencer for automobiles, etc. Expired - Lifetime JP2573235B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62193568A JP2573235B2 (en) 1987-07-31 1987-07-31 Air intake and exhaust system silencer for automobiles, etc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62193568A JP2573235B2 (en) 1987-07-31 1987-07-31 Air intake and exhaust system silencer for automobiles, etc.

Publications (2)

Publication Number Publication Date
JPS6436911A JPS6436911A (en) 1989-02-07
JP2573235B2 true JP2573235B2 (en) 1997-01-22

Family

ID=16310183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62193568A Expired - Lifetime JP2573235B2 (en) 1987-07-31 1987-07-31 Air intake and exhaust system silencer for automobiles, etc.

Country Status (1)

Country Link
JP (1) JP2573235B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9003959D0 (en) * 1990-02-21 1990-04-18 Ross Colin F Active control of internal combustion engine performance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599699A (en) * 1982-07-07 1984-01-19 日産自動車株式会社 Control of sound field in chamber of automobile
JPS62168913A (en) * 1986-01-20 1987-07-25 Mazda Motor Corp Exhaust sound reducing device for engine

Also Published As

Publication number Publication date
JPS6436911A (en) 1989-02-07

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